NVIDIA has largely been sitting pretty since the GeForce 10-series arrived and gave it a comfortable performance lead in the graphics realm, but things have changed: AMD's Vega cards are at least fast enough that you might consider them instead. Needless to say, NVIDIA isn't about to let that situation stand. It's launching the GeForce GTX 1070 Ti, a $449 upper mid-range card that could outperform the $399 Vega 56 and undercut the $499 Vega 64 on price. For all intents and purposes, it's very nearly as powerful as a GTX 1080: you have the same core clock speed as the pricier board, and only slight hits to the CUDA core count (2,432 vs. 2,560), texture units (152 vs. 160) and boost clock (1,683MHz vs. 1,733MHz). About the only major difference is that you're still limited to 'just' GDDR5 memory instead of the speedier GDDR5X on the 1080.
Via: Ars Technica
Source: NVIDIA (1), (2)